Method of improving the operation of backwashable fixed beds for

Details Method of improving the operation of backwashable fixed beds for Method of improving the operation of backwashable fixed beds for

1977-02-25

1978-09-12

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 63R, 210 80, C02C 104, B01D 3700

Patent

active

041136136

ABSTRACT:
A method of improving the operation of backwashable fixed beds formed of granular materials and used during purification of waste water of sewage or during water treatment, wherein the fixed bed is conditioned during a last step of the backwashing operation by filling the fixed bed with a liquid for a predetermined time duration. The liquid contains distributed as uniformly as possible therein at least one substance which in the presence of a catalytically triggered decomposition reaction gives off a gaseous component and thereafter the liquid to be treated is filtered.

REFERENCES:
patent: 1966279 (1934-07-01), Behrman
patent: 2105835 (1938-01-01), Krause
patent: 3282702 (1966-11-01), Schreiner
patent: 3705098 (1972-12-01), Shepherd et al.
patent: 3932278 (1976-01-01), Meidl et al.

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